Adjustable tailgate for a truck



FIG. 1 is a top, end and side perspective view of the adjustable tailgate for a truck showing my new design;

FIG. 2 is a front end elevational view thereof;

FIG. 3 is a rear end elevational view thereof;

FIG. 4 is a side elevational view thereof;

FIG. 5 is an opposite side elevational view thereof; and,

FIG. 6 is a top plan view thereof, it being understood that the bottom is substantially a mirror image of the top. 

The ornamental design for an adjustable tailgate for a truck, as shown and described. 